Africa: Four degree rise 'would scupper African farming'

A widespread farming catastrophe could hit Africa if global temperatures rose by four degrees Celsius or more, according to a study that calls for urgent planning for a much warmer future and investment in technology to avert disaster. In most of southern Africa the growing season could shrink by as much as a fifth, according to scientists at the International Livestock Research Institute (ILRI) in Kenya, who carried out simulation studies based on existing climate change models.